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Hello,
I'm trying compile a external kernel module of a proprietary driver. The makefile build object files, but seems that where Building modules, stage 2 start the headers doesn't found. The output is something like that
....
LD [M] /Linux_PPC/EZpul_k26.o
Building modules, stage 2.
MODPOST 1 modules
WARNING: "__kmalloc" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "strlen" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "sprintf" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "jiffies" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "memset" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "printk" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "schedule_timeout" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "vsnprintf" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "kfree" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "memcpy" [/Linux_PPC/EZpul_k26.ko] undefined!
WARNING: "memmove" [/Linux_PPC/EZpul_k26.ko] undefined!
CC /Linux_PPC/EZpul_k26.mod.o
/Linux_PPC/EZpul_k26.mod.c:8: error: variable '__this_module' has initializer but incomplete type
...
The main Make invocation is like
$(MAKE) -C $(KDIR) M=$(PWD) BASEDIR=$(BASEDIR) CROSS_COMPILE=ppc_6xx- ARCH=powerpc
EXTRA_CFLAGS has a Include dirs for proprietary source code
CFLAGS has include for kernel source ($(KDIR)/include)
Where previous Variables are correctly set.
I searched about this, but can't found nothing helpfull.
Some Tip ?
Thanks a lot.
Solved
I solved this problem some time after the previous post, and for someone that have the same problem that I had, for future references, I will explain what happens.
This error is caused because the kernel modules support isn't enable, the solution is simple, just run:
make ARCH=YOUR_ARCH CROSS_COMPILE=YOUR_CROSSCOMPILE menuconfig
[*] Enable loadable module support
[*] Module unloading (not necessary, but very useful)
and recompile the kernel.
After that, the modules will compile fine.